Higher-order topological phases in crystalline and non-crystalline systems: a review.

In recent years, higher-order topological phases have attracted great interest in various fields of physics. These phases have protected boundary states at lower-dimensional boundaries than the conventional first-order topological phases due to the higher-order bulk-boundary correspondence. In this review, we summarize current research progress on higher-order topological phases in both crystalline and non-crystalline systems.

Identification and virtual screening of novel salty peptides from hydrolysate of tilapia by-product by batch molecular docking.

Introduction: Tilapia produces a large number of by-products during processing, which contain potentially flavorful peptides.

Methods: The application of PyRx software enabled batch molecular docking andscreening of 16 potential salty peptides from 189 peptides identified in the enzymaticdigestion of tilapia by-products.

Results: According to sensory analysis, all 16 peptides werepredominantly salty with a threshold of 0.

Symmetry-Protected Topological Phases in a Rydberg Glass.

Recent theoretical studies predict that structural disorder, serving as a bridge connecting a crystalline material to an amorphous material, can induce a topological insulator from a trivial phase. However, to experimentally observe such a topological phase transition is very challenging due to the difficulty in controlling structural disorder in a quantum material. Given experimental realization of randomly positioned Rydberg atoms, such a system is naturally suited to studying structural disorder induced topological phase transitions and topological amorphous phases.

Structural-Disorder-Induced Second-Order Topological Insulators in Three Dimensions.

Higher-order topological insulators are established as topological crystalline insulators protected by crystalline symmetries. One celebrated example is the second-order topological insulator in three dimensions that hosts chiral hinge modes protected by crystalline symmetries. Since amorphous solids are ubiquitous, it is important to ask whether such a second-order topological insulator can exist in an amorphous system without any spatial order.